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########################################################################
# $Header: /var/local/cvsroot/4Suite/Ft/Xml/__init__.py,v 1.38 2005/04/12 06:32:17 mbrown Exp $
"""
Things commonly needed by many modules in Ft.Xml
Copyright 2005 Fourthought, Inc. (USA).
Detailed license and copyright information: http://4suite.org/COPYRIGHT
Project home, documentation, distributions: http://4suite.org/
"""
__all__ = [# constants
'EMPTY_NAMESPACE',
'EMPTY_PREFIX',
'XML_NAMESPACE',
'XMLNS_NAMESPACE',
'XHTML_NAMESPACE',
'READ_EXTERNAL_DTD',
'HAS_PYEXPAT',
# classes
'ReaderException', 'XIncludeException',
# functions
'SplitQName', 'ApplyXUpdate',
# modules
'MarkupWriter',
]
EMPTY_NAMESPACE = None
EMPTY_PREFIX = None
XML_NAMESPACE = u"http://www.w3.org/XML/1998/namespace"
XMLNS_NAMESPACE = u"http://www.w3.org/2000/xmlns/"
XHTML_NAMESPACE = u"http://www.w3.org/1999/xhtml"
# Defined here to ensure that all readers operate the same.
READ_EXTERNAL_DTD = True
from Ft import FtException, __version__
class ReaderException(FtException):
"""
Exception class for errors specific to XML reading
(at a level above standard, non-namespace-aware parsing)
"""
XML_PARSE_ERROR = 100
RECURSIVE_PARSE_ERROR = 101
XMLNS_UNKNOWN_PREFIX = 200
INVALID_XMLNS = 201
XMLNS_DUPLICATE_ATTRS = 202
def __init__(self, errorCode, *args):
FtException.__init__(self, errorCode, MessageSource.READER, args)
return
class XIncludeException(FtException):
"""
Exception class for errors specific to XInclude processing
"""
MISSING_HREF = 10
INVALID_PARSE_ATTR = 11
def __init__(self, errorCode, *args):
FtException.__init__(self, errorCode, MessageSource.XINCLUDE, args)
import MessageSource
from Ft.Xml.Lib.XmlString import SplitQName
#Wrap this so that we can import it later
def ApplyXUpdate(*args, **kw_args):
import Ft.Xml.XUpdate
return XUpdate.ApplyXUpdate(*args, **kw_args)
#Good ol' backward compatibility for creative spellings
def ApplyXupdate(*args, **kw_args):
import Ft.Xml.XUpdate
return XUpdate.ApplyXupdate(*args, **kw_args)
from distutils import version
pyxml_required = version.StrictVersion('0.8.0')
def CheckVersion(feature=None):
"""
PyXML is required by some features of 4Suite (e.g., validating parsing,
and 4XSLT's SaxWriter). This is a common function to test whether a
correct version of PyXML is installed. It raises a SystemExit if the
test result is negative, and returns None otherwise.
The feature argument is a string indicating which feature in 4Suite
requires PyXML. It is output as part of the SystemExit message.
"""
try:
import _xmlplus
xml_version = version.StrictVersion(_xmlplus.__version__)
except:
xml_version = version.StrictVersion('0.0.0')
if xml_version < pyxml_required:
import sys
if feature:
feature_string = "%s in " % feature
else:
feature_string = "this feature in "
print """
PyXML v%s is required for %s4Suite.
It is available at http://sourceforge.net/projects/pyxml.
""" % (str(pyxml_required), feature_string)
sys.exit(1)
HAS_PYEXPAT = True
try:
from xml.parsers import expat
expat.ParserCreate
del expat
except (ImportError, AttributeError):
HAS_PYEXPAT = False
from MarkupWriter import MarkupWriter
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